Heating-furnace.



PATENTED 0 H. A. DENZ IN. HEATING FURNACE. APPLICATION FILED ov. 22. 1905,

, I INVEN'IIEIR ATTORNEY WITNESSES J ax/77900 STATES PATENT HENRY A. DENZIN, OF ROSS TOWNSHIP, ALLEGHENY COUNTY, PENNSYLVANIA.

HEATING-FURNACE.

To all whom 'it' may concern:

Be it known that I, HENRY A. Dnnznv, a citizen of the United States, residing in the township of Ross,-in' the county of Allegheny and State of Pennsylvania, I

have invented or discovered new and useful Improve ments in Heating-Furnaces, of which the following is a specification.

I My invention consists of certain new and useful improvements in hot air heating stoves and furnaces,

especially relating to the use of natural or artificial gas as the heating agent. The mutual relation and position of the hot fume and air heating chambers is such that the largest possible percentage of heat is obtained from the fumes before they are delivered to the escape pipe, the same being led and baffled about the Walls of the hot air 'fiues or chambers through which the air is allowed torise unobstructedly so that entire wall area i of the air chamber isheated.

In the accompanying drawings, Figure 1 is a vertical section through furnace and outer casing, the burner being shown in full, Fig. 2 is a sectional plan along the line 1111 in Fig. 1 and Fig. 3 is a perspective of the burner. l

The following is a detailed descriptiomof the drawings: 1 is the outer casing which for convenience is made in two sections joined together horizontally'as at l. 2 is the top or cover of the casing thus forming a hot air chamber 3 in the upper part of the casing from which lead hot air pipes 44 to the house registers or hot air flues, as-the case may be.

The body of the furnace proper is composed of a plurality of concentric metal Walls forming a plurality of.

concentric annular chambers surrounding a central cylindrical chamber. The outer chamber 5, which is a fume chamber, is closed at top and-bottom. The chamber 6 next within, is an air heating chamber open at top and bottom. The chamber 7, next within, is a fume chamber and closed at the top, while the central, cylindrical chamber, 8, is an 'air heating chamber and open at top. andbottom. The chamber 7 near its top is connected with chamber 5 by means of flue 9 crossing chamber 6, while diametrically opposite to flue 9 fume pipe 10, preferably of somewhat less diameter, leads from the upper part of chamber 5 through casing l to the housev chimney. On each side half way between i The furnace body is supported from casing -l by any convenient means as by bars 1212, underneath said body and attached at their ends to casing 1, any required number of the same being provided. The outer Specification of Letters Patent. Application filed November 22,1906. Serial N0. 34 ,5

Patented 0st. 22, 1907.

wall of chamber 7 is extended downwardly to a point adjacent to the floor. while the wall of chamber 8 is aiso extended downwardly to a somewhatless extent:

13 is a burner composed of -a hollow annular body, better shown in- Fig 3, which'is supported by being slipped up over the lower extremity of thewall of chamher 8 and secured in place by any convenient means as by -.slightl'y ,fiang ing the lower edge of said wall. 1414 area plurality of hol'e's punched inthe outer face of said burner to permit the escape of .the gas which is ignited on said-face in little jets or flames. Gas is supplied to said burner by pipe 15 entering through casing 1 and provided exterior to said casing with valve 16 and air mixer 17 I 18 is a pipe supplying air to the face of burner 13 to aid incombustion. l i

The outer wall of chamber 7 is provided with an aperture 19, preferably square, which is connected by .means of air tight box 20 to similar aperture 21 in-the for lighting the furnace while the air tight box prevents any products of combustion entering the interior of casing 1 in case of aback draft in the house chimney. The operation of my furnace is as follows:flhe hot fumes and products of combustion arising from the face of burner 13 rise in fume chamber- 7 surround-. ing the outer wall of air heating chamber 8 and passing by'means of flue 9 at the top into chamber 5 wherein they pass downward under baffles 1111 and .up to pipe 10 whereby they escape into the house chimney.

The air admitted into the interior of casing 1 by means of a fresh air duct or opening, not shown, passes up through the interior of air heating chambers 8 and 6 and the space between the casing 1 and the outer wall of chamber 5, into hotair chamber 3 whence it passes out into hot airpipes44. It is evident that the fumes at their hottest surround. air heating chamber 8 and move over the inner wall of air heating chamber 6 after which they are baffled overthe entire surface of the outer wall of said chamber 6, and at the same time heat the air passing upward in the space within the casing exteriorlto chamber 5 It is evident that the largest possible percentage of heat is thus extracted from the fumes and products of combustion before they are delivered to the house chimney. It is elso evident that the entire wall area of the air heating chamber is subjected to the action of the hot fumes. is therefore no dead wall space in the furnace.

The advantages of my novel. construction are, inter alia, the thoroughness with which the vertical air passages or chambers are exposed tothe heating power There I cost of materials and in time required for manufacture and erection.

Although I have described the construction shown in the accompanying drawings, I do not wish to limit myself thereby but claim broadly:

1. In furnaces, an outer casing and a furnace body contained therein consisting of a. plurality of concentric .annular walls formihg a central air chamber, open at both ends, a fume chamber surrounding said central air chamber and closed at the top, a secondair chamber-surrounding said fume chamber and open at both ends, a second fume chamber surrounding said second air chamber and closed at both ends, a horizontal fume flue adjacent to the top of said body and adapted to conduct the tnmes from said -tirst fume chamber to said second fume chamber, a fume 2. In furnaces, an outer casing and a furnace body c ontalned therein and consistim. of a plurality of concentric cylindrical walls, the two inner walls extending downwardly beyond the remainder of the furnace body, forming between the same first a central air chamber open at top and bottom, next encircling the same an annular fume chamber closed at the top, next encircling the same an annular air chamber open at top and bottom and next encircling the same an annular fume chamber closed at top and bottom; a horizontal fume flue leading from a point in said' first fumechamber, adjacent to the top thereof, to said second fume chamber, a fume pipe leadingfrom said second fume chamber to a point without said casing, diametrically op'poslte to said fume flue, bailies extending downwardly within's'aid second fume chamber and bottom, an annular i'ume chamber closed at thetop next surrounding said central air chamber, an annuiarair chamber open at. top and bottom next surrounding said fume chamber and a second fume chamber closed at top and bottom next. surrounding said' second air chamber,

said central air chamber and first t'ume'chambei: extending downwardly below the remainder of said furnace body, a. fume flue connccrint, said fume chambers adjacent to the top thereof, a fume pipe, diametrically opposite to said fumc ilue con'nccring the Mir-mid fume chamber to a point \Villmlll'. the oulcr casing and an annular burner body within said iirst l'ulne chamber mounted on the base of said central air chamber.

4. in furnaces. an outer casing and a furnace body contained tin-rein composed of -a plurality of concentric walls forming a central cylindrical air chamber open at top and bottom. an annular lumc chamber closcd at the top next surrounding said centrai air chamber. an annular air chamber open at top and bottom next surrouu(lingsai(l l'umo chamber and a second fume chamber closed at'top audbotiom next surrounding said second nir chamber, said central air chamber and first fume chamber extending downwardly below the remainder of said furnace. body, a fume tlue connecting said fume chambers adjacent to the top thereof, a fume pipe, diametrically opposite to said fume line, connecting the' second fume chamber to a point without the outer casing, an annular burner body within said first fume chamber mounted on the base of said central air chamber and an inclosed pasage connecting the interior of said first fume chamber with the exterior of said casing.

Signed at Bellevue Pa., this 20 day of November 1906.

HENRY A. DENZI N.

Witnesses Geo. J. CAMPBELL, EDWARD A. -LAWRENCE. 

